Tlayúa Formation
The Tlayúa Formation is an Early Cretaceous (late Albian) geological formation near Tepexi de Rodríguez, Puebla.[1]
| Tlayúa Formation | |
|---|---|
| Stratigraphic range: | |
| Type | Geological formation |
| Sub-units | Lower, Middle and Upper Members |
| Underlies | Unconformity with Eocene-Oligocene Pie de Vaca Formation |
| Overlies | Orizaba Formation |
| Thickness | Lower: 50 m Middle: 35 m Upper: 40 m |
| Lithology | |
| Primary | Limestone |
| Other | Mudstone |
| Location | |
| Coordinates | 19.1°N 98.2°W |
| Approximate paleocoordinates | 17.1°N 61.6°W |
| Region | Puebla |
| Country |  Mexico |
| Type section | |
| Named for | Tlayúa Quarry |
  Tlayúa Formation (Mexico) | |
Paleobiota
The formation contains a diverse array of vertebrate and invertebrate fossils. About 70% of the macrofossils are osteichthyan fish.[2] Other vertebrates include chelonians, pterosaurs, lepidosaurs, and crocodiles.[3] Cyanobacteria, foraminifera, algae, gymnosperms, sponges, cnidarians, annelids, gastropods, ammonites, bivalves, arachnids, insects, isopods, anomurans, brachyurans, crinoids, echinoids, holothuroids, stelleroids, and ophiuroids, have also been recovered from the Tlayúa Formation.[3]
Lepidosaurs
| Genus | Species | Abundance | Notes |
|---|---|---|---|
| Huehuecuetzpalli | H. mixtecus | A primitive lizard | |
| Pamizinsaurus | P. tlayuaensis | An osteoderm-covered sphenodontian | |
| Ankylosphenodon[4] | A. pachyostosus | An aquatic sphenodontian | |
| Tepexisaurus[5] | T. tepexii | A basal scincomorph | |
- Other fossils
- Archaeoniscus aranguthyorum
- Axelrodichthys cf. araripensis
- Ophiactis applegatei
- Paleopentacta alencasterae
- Parapsolus tlayuensis
- Protaegla miniscula
- Quetzalichthys perrilliatae
- Teoichthys kallistos
- Tepexicarcinus tlayuaensis
- Tepexichthys aranguthyrom
- cf. Araucaria sp.
- Brachyphyllum sp.
- Ellimmichthys sp.
- Lepidotes sp.
- Megalops sp.
- Notelops sp.
- Podozamites sp.
- Vinctifer sp.
- Zamites sp.
- Testudines indet.
References
- Applegate, S. (1988). "A new genus and species of a holostean belonging to the family Ophiopsidae, Teoichthys kallistos, from the Cretaceous, near Tepexi de Rodriguez, Puebla" (PDF). Revista Mexicana de Ciencias Geológicas. 7 (2): 200–205.
- Alvarado-Ortega J, González-Rodríguez KA, Blaco-Piñón A, Espinosa-Arrubarrena L, Ovalles-Damián E (2006). "Mesozoic Osteichthyans of Mexico". In Vega, FJ, TG Nyborg, MC Perrilliat, M. Montellano-Ballesteros, SRS Cevallos-Ferriz. (eds.). Studies on Mexican Paleontology, Topics on Geobiology 24. Dordrecht, Netherlands: Springer Verlag. pp. 169–207. ISBN 1402039859.
- Vega FJ, Bruce NL, Serrano L, Bishop GA, Perrilliat MD (2005). "A review of the Lower Cretaceous (Tlayúa Formation: Albian) Crustacea from Tepexi de Rodríguez, Puebla, Central Mexico" (PDF). Bulletin of the Mizunami Fossil Museum (32): 25–30. Archived from the original (PDF) on 2011-06-12.
- Reynoso, V. H. (2000). "An Unusual Aquatic Sphenodontian (Reptilia: Diapsida) from the Tlayua Formation (Albian), Central Mexico". Journal of Paleontology. 74 (1): 133–148. doi:10.1017/S0022336000031310. JSTOR 1306891.
- Vega, Francisco J.; Nyborg, Torrey G.; María del Carmen Perrilliat; Marisol Montellano-Ballesteros; Sergio R.S Cevallos-Ferriz; Sara A. Quiroz-Barroso (2006). "Research on Fossil Amphibians and Reptiles". In Landman, Neil H. (ed.). Studies on Mexican Paleontology. Vol. 24. Douglas S. Jones. Dordrecht, Netherlands: Springer. p. 214. ISBN 1-4020-3882-8. Retrieved 31 May 2011.
Further reading
- L. Martin-Medrano and P. Garcia-Barrera. 2006. Fossil Ophiuroids of Mexico. In F. J. Vega, T. G. Nybor, M. D. C. Perrillat, M. Montellano-Ballesteros, S. R. S. Cevallos-Ferriz, S. A. Quiroz-Barroso (eds.), Topics in Geobiology 24:115-131
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